© National Instruments | 2-17
RMX Programmable Power Supplies User Manual
Figure 2-19. Display of the OCP Activation Alarm
7. Check the output has turned off.
If you do not change the output settings, the OVP or OCP function will be activated again.
Undervoltage Limit (UVL)
This protection function is activated when you attempt to set the output voltage to a value that
is lower than the set undervoltage limit (the UVL trip point). In other words, it prevents you from
setting the output voltage to a value lower than the set limit. Triggering this protection function
does not turn the output off.
CONFIG setting CF15 allows you to choose whether the output setpoint is limited so that it
cannot be set to a value lower than the UVL trip point.
Complete the following steps to set the UVL trip point.
1. Press OCP•OVP.
The OCP•OVP key lights, and the OVP trip point and OCP trip point are displayed in the
display area.
2. Press OCP•OVP again. The present UVL trip point is displayed.
Figure 2-20. Display Example of the UVL Setting
3. While viewing the panel display, turn the VOLTAGE knob to set the UVL trip point.
4. Press OCP•OVP to finalize setting.
Table 2-1. UVL Setting Range 0 to 105% of the Rated Output Voltage
RMX-4120/
RMX-4124
RMX-4121/
RMX-4125
RMX-4122/
RMX-4126
RMX-4123/
RMX-4127
UVL Setting 0 to 31.5 V 0 to 84 V 0 to 241.5 V 0 to 682.5 V
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